Actually, most druids stealth before an arena match begins, so you really don’t know what they are until they pop out. Also, on the Paladin comment, you can tell pretty much what spec a Paladin is by looking at how much Mana they have. Between 5-10k they’re ret, 20k+ they’re holy. Prot will have around the same Mana pool as ret, but you’ll be able to tell by their health or what gear they’re wearing (Sword/Board or Two Hander).